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Dissertations / Theses on the topic 'High carbon steel'

Author: Grafiati

Published: 3 June 2023

Last updated: 25 July 2025

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1

Kim, Bae-Kyun. "High temperature oxidation of low carbon steel." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19519.

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The quality of steel may be seriously affected by the surface defects that appear on slab surfaces after hot rolling. These defects are related to iron oxidation and, in order to reduce the occurrence of these defects, it is necessary to better understand the formation of iron oxides during high temperature oxidation and the oxide descaling mechanisms. However, systematic research tools and experimental strategies for addressing these issues have not yet been developed. In addition, the mechanisms of oxide cracking and failure have not been understood. In this thesis, research tools and strate

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2

Paul, Graeme William Alexander. "Strain aging of high carbon steel wire." Thesis, University of Strathclyde, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366744.

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3

Kuno, Masato. "Fretting damage of high carbon chromium bearing steel." Thesis, University of Nottingham, 1988. http://eprints.nottingham.ac.uk/13207/.

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This thesis consists of four sections, the fretting wear properties of high carbon chromium bearing steel; the effect of debris during fretting wear; an introduction of a new fretting wear test apparatus used in this study; and the effects of fretting damage parameters on rolling bearings. The tests were operated under unlubricated conditions. Using a crossed cylinder contact arrangement, the tests were carried out with the normal load of 3N, slip amplitude of 50µm, and frequency of 30Hz at room temperature. The new fretting wear test rig consists of a sphere-on-plate arrangement, and the norm

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4

Steiner, J. L. d'E. "High carbon stainless steels for petrochemical steam reformers." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355861.

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5

Sung, Pil Kyung 1961. "Segregation and structure in continuously cast high carbon steel." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277066.

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After hot rolling, the presense of segregation in the center of wire-rod can lead to a nonuniform transformation, resulting in bands of martensite in the microstructure. This is considered to be a defect, called center-martensite, because it can cause cracks and breaks during wire drawing. To identify the mechanism for the formation of center-martensite in wire-rod, the structure, macrosegregation and microsegregation in unworked billets were characterized. Based on measurements of secondary dendrite arm spacings, cooling rates during solidification were estimated. It appears that the macroseg

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6

Crowe, David Charles. "The high temperature electrochemical behavior of carbon steel in alkaline sulfide solutions." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25567.

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The high temperature, high pressure electrochemical behavior of A516 Gr. 70 carbon steel in aqueous alkaline sulfide solutions was studied by means of polarization tests and cyclic volt-ammetry. The effects of variation of temperature (90-150°C), sulfide concentration (0-3 m), scan rate (1-50 mV/s) and scan range, and the effects of stirring and polarization at the switching potentials between scans were investigated. Passivation was consistent with formation of a protective Fe₂O₃ film. An understanding of the electrochemical behavior of iron in the alkaline sulfide solutions was facilitated

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7

Massé, Thomas. "Study and optimization of a high carbon steel flat wires." Paris, ENMP, 2010. http://www.theses.fr/2010ENMP1672.

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Cette thèse porte sur la modélisation par éléments finis des procédés de mises en forme à froid, que sont le tréfilage et le laminage. Tout d'abord le comportement mécanique des aciers haut carbone a été mesuré grâce à une large campagne d'essais expérimentaux tout au long de cette gamme de mise en forme et une progressive anisotropie mécanique a été observée au cours du tréfilage. Puis, la simulation numérique du tréfilage et du laminage a été réalisée à l'aide de FORGE2005®. Le résultat principal concerne la prédiction de l'élargissement en fin de laminage qui est très imprécise avec une loi

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8

Fang, Haitao. "Low Temperature and High Salt Concentration Effects on General CO₂ Corrosion for Carbon Steel." Ohio : Ohio University, 2006. http://www.ohiolink.edu/etd/view.cgi?ohiou1163794555.

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9

Dixon, Philip R. "The thermomechanical properties of 224-carbon steel at high strain rates." Thesis, Loughborough University, 1990. https://dspace.lboro.ac.uk/2134/6821.

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10

Olsson, Sara, and Linn Efsing. "Wear testing of high-alloy carbon steel used in mining tools." Thesis, KTH, Materialvetenskap, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124595.

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Wear is a commonly occurring degradation mechanism for materials and components in the rock drilling industry. The wear can occur by either abrasion or adhesive wear. Further corrosion and presence of water or other lubricating fluids with or without particles may influence the behavior. Which mechanism, or mechanisms, and under which conditions it occurs, as well as the relative wear rate is dependent on the actual operating conditions for the component. In the present study, commonly available and general test methods for wear on high-alloy carbon steel has been analyzed. The project has bee

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11

Qu, Hao. "ADVANCED HIGH STRENGTH STEEL THROUGH PARAEQUILIBRIUM CARBON PARTITIONING AND AUSTENITE STABILIZATION." Case Western Reserve University School of Graduate Studies / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=case1346250505.

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12

Qu, Hao. "Advanced High Strength Steel Through Paraequilibrium Carbon Partitioning and Austenite Stabilization." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1283353953.

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13

Peiris, Nisal Abheetha. "STEEL BEAMS STRENGTHENED WITH ULTRA HIGH MODULUS CFRP LAMINATES." UKnowledge, 2011. http://uknowledge.uky.edu/gradschool_diss/204.

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Advanced composites have become one of the most popular methods of repairing and/or strengthening civil infrastructure in the past couple of decades. While the use of Fiber Reinforced Polymer laminates and sheets for the repair and strengthening of reinforced concrete structures is well established, research on the application of FRP composites to steel structures has been limited. The use of FRP material for the repair and rehabilitation of steel members has numerous benefits over the traditional methods of bolting or welding of steel plates. Carbon FRPs (CFRPs) have been preferred over other

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14

Schnerch, David. "Strengthening of Steel Structures with High Modulus Carbon Fiber Reinforced Polymer (CFRP) Materials." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-06152005-090112/.

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Transportation departments and the telecommunications industry are currently demanding cost-effective rehabilitation and/or strengthening techniques for steel structures, including bridges and monopole towers. Rehabilitation is often required due to cross-section losses resulting from corrosion damage and strengthening may be required due to changes in the use of a structure. Current strengthening techniques, have several disadvantages including their cost, need to match the surface configuration of the existing structure, poor fatigue performance and the need for ongoing maintenance due to co

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15

Rosli, Nor Roslina. "The Effect of Oxygen in Sweet Corrosion of Carbon Steel for Enhanced Oil Recovery Applications." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448974434.

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16

Jauseau, Nicolas. "Multiphase Flow Effects on Naphthenic Acid Corrosion of Carbon Steel." Ohio University / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1354149810.

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17

Song, Wenwen [Verfasser]. "Characterization and simulation of bainite transformation in high carbon bearing steel 100Cr6 / Wenwen Song." Aachen : Shaker, 2014. http://d-nb.info/1060622785/34.

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18

Yagi, Shunsuke. "Surface modification process for high-purity iron and carbon steel by alternating pulsed electrolysis." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136229.

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19

Trueman, Anthony Roger. "Characterization and corrosion studies of high carbon tool steel/tungsten carbide metal matrix composites." Thesis, Queensland University of Technology, 1999.

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20

Barnes, Peter Edward. "An investigation into the corrosion fatigue behaviour of high strength carbon steel tensile armour wires." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/an-investigation-into-the-corrosion-fatigue-behaviour-of-high-strength-carbon-steel-tensile-armour-wires(1fdde868-c9b9-424f-a472-5b9c0ae5273e).html.

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The corrosion fatigue behaviour of high strength carbon steel tensile armour wires that are used in flexible risers has been explored. An investigation of the corrosion fatigue failure mechanisms for two different sets of corrosion fatigue tested high strength steel wires has been carried out. The two different tensile armour wires were 12 mm x 4 mm and 12 mm x 7 mm. The wires had been corrosion fatigue tested in up to three different seawater environments, namely aerated, CO2 saturated to 1 bar absolute and 100 mbar absolute H2S-CO2 balance to 1 bar absolute. The corrosion fatigue failure inv

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21

Suhor, Muhammad Firdaus. "Effect of Iron Carbonate Deposition on Mild Steel Corrosion in High Partial Pressure Carbon Dioxide Systems." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1532376719359574.

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22

Dawood, Mina Magdy Riad. "Fundamental Behavior of Steel-Concrete Composite Beams Strengthened with High Modulus Carbon Fiber Reinforced Polymer (CFRP) Materials." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-06292005-192140/.

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There is a growing need for a cost-effective, durable repair system that can be used for the repair and strengthening of steel bridges. Recently, high modulus carbon fiber reinforced polymers (CFRP) have been developed with a modulus of elasticity approximately two times greater than that of steel. Externally bonded high modulus CFRP materials have successfully been used to increase the elastic stiffness and ultimate capacity of steel-concrete composite beams However, since the technology is relatively new, the detailed behavior of steel bridge members strengthened with high modulus CFRP is no

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23

Lyaya, E. C. "Macroscopic and microscopic variation of iron and high carbon steel production in the Southern Highlands of Tanzania." Thesis, University College London (University of London), 2013. http://discovery.ucl.ac.uk/1398300/.

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One essential feature of African iron production process is that it is greatly variable in culture and technology. The early research focused on some themes: origins, culture, and how iron was produced, which were investigated using archaeological, ethno-archaeological, and experimental methods. The purpose of this thesis was to examine the relationship between macroscopic and microscopic variation of iron and steel production in the southern highlands of Tanzania. I used field methods: ethnographic inquiry, surface and sub-surface survey, mapping, and excavation; and laboratory analytical tec

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24

Stanford, Kirk Alan. "STRENGTHENING OF STEEL STRUCTURES WITH HIGH MODULUS CARBON FIBER REINFORCED POLYMERS (CFRP) MATERIALS: BOND AND DEVELOPMENT LENGTH STUDY." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-12202008-112409/.

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Cost-effective solutions for the rehabilitation and strengthening of steel structures, such as steel bridges and steel monopole towers used for cellular phone antennas, are greatly needed by government transportation departments and industry. Rehabilitation is often required due to loss of cross-section from corrosion and/or changes of the demand or use of a structure. Current techniques for strengthening steel structures have several drawbacks including requiring heavy equipment for installation, their fatigue performance, in addition to the need for ongoing maintenance due to continued corro

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25

Mohamed, Mohd Farid. "Water Chemistry and Corrosion Inhibition in High Pressure CO₂ Corrosion of Mild Steel." Ohio University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1429223819.

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26

Mazidi, Aimal. "Comparison of a new, high precision, energy efficient welding method with the conventional Gas Metal Arc Welding on high carbon steel base metal." Thesis, Högskolan Väst, Avd för tillverkningsprocesser, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-6860.

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CMT+P welding is less susceptible to hot cracking than the MAG welding process due to use of low heat input properties. Solidification cracking was found in all weld specimens that had greater 0.39KJ/mm heat inputs. Cracking occurs because of the contraction stresses generates during cooling. Hydrogen cracking is found in HAZ with low heat input parameters, this type of cracking occurred because of very rapid cooling and therefore not enough time to allow the hydrogen to dissipate from the specimen. To eliminate this type of cracking the experiment could be repeated by adding heating during we

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27

Haddad, Mike [Verfasser]. "Nanostructure evolution and enhancement of mechanical properties for medium carbon steel through high pressure torsion processing-nanosteels / Mike Haddad." Ulm : Universität Ulm, 2017. http://d-nb.info/1132713080/34.

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28

Tran, Tu Anh. "Modelling and experimental study of secondary dendrite arm spacing and micro-segregation in continuously cast high carbon bloom steel." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/5635/.

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29

Khusru, Shovona. "High performance hybrid structural column with rubberised concrete under axial compressive loading." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/233665/1/Shovona_Khusru_Thesis.pdf.

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Every year millions of tyres are disposed of worldwide in landfill resulting in the rise of an environmental burden. This thesis demonstrates the development of a sustainable novel hybrid double skin tubular column utilizing the scrap tyre rubbers. The proposed column made with rubberised concrete infill, filament wound FRP outer tube and steel inner tube, has been studied extensively through experimental testing, finite element modelling and parametric studies, to understand the structural performance under axial loading. This column, compared to the traditional column will be sustainable and

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30

Lin, Kaijie. "Development of advanced plasma surface technologies for high performance carbon paper gas diffusion layer and 316 stainless steel bipolar plates." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6351/.

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In this work, a portfolio of novel active screen plasma surface engineering technologies have been developed including active screen plasma surface modification of carbon paper for gas diffusion layer (GDL) and active screen plasma surface co-alloying of 316 austenitic stainless steel with both interstitial alloying element of nitrogen and such substitutional alloying elements as silver (Ag), niobium (Nb) and platinum (Pt). The active screen plasma surface modification of GDL carbon paper at a low temperature for a short period of time can effective activate the carbon paper surface mainly due

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31

Agrizzi, Ronqueti Larissa. "Study of grain boundary oxidation of high alloyed carbon steels at coiling temperature." Thesis, Compiègne, 2018. https://bibliotheque.utc.fr/Default/doc/SYRACUSE/2018COMP2405.

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Les aciers à haute résistance (AHSS) ont été largement utilisés dans le cadre d’applications automobiles visant à améliorer la sécurité et l’allègement des structures. Afin d'atteindre les objectifs en termes de propriétés mécaniques, ces nouveaux aciers sont composés de teneurs en éléments d’alliages beaucoup plus élevés (par exemple silicium et manganèse) que les aciers usuels. En conséquence, l'AHSS est susceptible de subir une oxydation interne sélective lors du refroidissement des bobines d’acier. L'oxydation sélective interne, en particulier l'oxydation aux joints de grains (GBO), est ac

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32

Rodriguez, Alvaro A. "Corrosion inhibition mechanism of a surfactant admixture on carbon steel alloy ASTM A36 [UNS K02600] coated with a high performance UV-cured coating." University of Akron / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1460564870.

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33

VanTrees, Craig. "Analysis of Precipitates and Waters Associated with an Alkaline Leachate, Gulf State Steel Property, Gadsden, Alabama: A Reconnaissance Study." Digital Archive @ GSU, 2010. http://digitalarchive.gsu.edu/geosciences_theses/25.

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Calcite stalactites ranging in length from several inches to a foot long are found forming on the southeastern slag pile at the former Gadsden Steel Mill of the Gulf States Steel Corporation. Analyses of samples collected per EISOPQAM guidelines include the following: petrographic, conductivity, pH, XRD, XRF, TDS, and major cations and anions. Preliminary field pH and conductivity measurements indicate that waters near the slag pile have a pH ranging from 11-12 and a conductivity ranging from 1115-6300 Î¼S/ cm. Titration data indicate that the maximum pH value is 12.5. These calcite stalactite

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34

Gao, Shujun. "Thermodynamics and Kinetics of Hydrogen Sulfide Corrosion of Mild Steel at Elevated Temperatures." Ohio University / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1528836064560164.

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35

Ghasemi, Sahar. "Innovative Modular High Performance Lightweight Decks for Accelerated Bridge Construction." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2248.

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At an average age of 42 years, 10% of the nation’s over 607,000 bridges are posted for load restrictions, with an additional 15% considered structurally deficient or functionally obsolete. While there are major concerns with decks in 75% of structurally deficient bridges, often weight and geometry of the deck further limit the load rating and functionality of the bridge. Traditional deck systems and construction methods usually lead to prolonged periods of traffic delays, limiting options for transportation agencies to replace or widen a bridge, especially in urban areas. The purpose of this s

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36

Sjoberg, Elf Julia, and Espinosa Kristoffer Wannheden. "Carbon capture and utilisation in the steel industry : A study exploring the integration of carboncapture technology and high-temperature coelectrolysisof CO2 and H2O to produce synthetic gas." Thesis, KTH, Energiteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-226729.

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The present thesis studies the potential for introducing the technology of co-electrolysis of carbondioxide (CO2) and water (H2O) through a Solid Oxide Electrolyser Cell (SOEC) in a top gas recyclingblast furnace (TGR-BF) in a steel plant. TGR-BF, commonly presented in literature as a promisingcarbon capture and storage (CCS) pathway for the steel industry, can drastically decrease theseemissions by successively recycling up to 90 % of the top gas from a blast furnace (EU, 2014) andsequestering the CO2 from the highly carbon concentrated remaining top gas. Blast furnaces (BF)represent about 20

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37

Behrani, Vikas. "Surface Modifications of Steels to Improve Corrosion Resistance in Sulfidizing-Oxidizing Environments." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19708.

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Industrial and power generation processes employ units like boilers and gasifiers to burn sulfur containing fuels to produce steam and syn gas (H2 and CO), which can generate electricity using turbines and fuel cells. These units often operate under environments containing gases such as H2S, SO2, O2 etc, which can attack the metallic structure and impose serious problems of corrosion. Corrosion control in high temperature sulfur bearing environments is a challenging problem requiring information on local gaseous species at the surface of alloy and mechanisms of degradation in these environmen

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38

Ng, Eric Eng Seng. "Laser welding of high carbon steels." Thesis, University of Glasgow, 1999. http://theses.gla.ac.uk/2143/.

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Laser welding, unlike conventional arc or gas welding, can be effectively utilised to produce high quality, clean and tough welds in high carbon steels. Results of welding high carbon steel are presented. The weld characteristics related to the fast cooling rate were critically evaluated and methods to reduce the rate of cooling were developed. The grain size produced in the fusion and narrow heat affected zones significantly affected the mechanical properties of the welded joint. Three lasers were used: Nd:YAG, CO2 and a high power laser diode (HPDL). The investigations were carried out using

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39

Pu, Xiaoxue. "Thermomechanical study of the gigacycle fatigue behavior of pure iron and carbon-manganese steels : influence of chemical composition and microstructure on damage and crack initiation mechanism." Thesis, Paris 10, 2019. http://www.theses.fr/2019PA100051.

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Ce travail tente de mieux comprendre les dommages par fatigue dans les aciers à ferrite-perlite dans la fatigue à très grand nombre de cycles (VHCF). Les influences de deux paramètres, le pourcentage de phase perlite et le pourcentage d'atomes interstitiels libres dans une solution solide, sont étudiées pour comprendre les mécanismes de dissipation en fatigue à 20 kHz. Une thermographie infrarouge in situ est réalisée pour enregistrer les changements de température, tandis que des observations au microscope sont menées pour étudier le mécanisme de dissipation. Pour les matériaux de BCC, sous f

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40

Plennevaux, Cécile. "Etude des risques de corrosion et de rupture différée des aciers en présence d'H2S dans les conditions d'exploration de pétrole et de gaz à haute pression et haute température." Thesis, Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0101.

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L'exploitation des champs de pétrole et de gaz sous haute pression (HP) et haute température (HT) a augmenté ces dernières années, nécessitant de réévaluer les risques de corrosion dans ces milieux de plus en plus sévères. Afin de contribuer à une meilleure évaluation des risques de rupture différée des aciers en présence d'H2S (SSC, Sulfide Stress Cracking) dans ces conditions, trois axes de recherche ont été suivis. Nous avons d'abord identifié un besoin d'amélioration de prédiction des conditions corrosives sous haute pression et haute température, et en particulier pour le calcul du pH in

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41

Huang, Zhiyong. "Endommagement des aciers au C-Mn en fatigue oligocyclique et gigacyclique." Thesis, Paris 10, 2010. http://www.theses.fr/2010PA100088.

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Dans les générateurs de vapeur des centrales nucléaires à eau pressurisée, les tuyauteries sont soumises à des chargements thermique et mécanique, qui sont variables et divisés en deux régimes différents : la fatigue oligocyclique et la fatigue gigacyclique. Les aciers au carbone – manganèse, type A42, A48 et Tu48 (normes françaises) sont souvent utilisés dans de telles applications. Les propriétés du matériau manifestent certains caractères spéciaux en mécanique et métallurgie comme le vieillissement dynamique conduisant à une augmentation de la valeur de la contrainte maximale et une diminut

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42

El-Wazri, Abdelbaset M. "Processing and properties of high carbon microalloyed steels." Thesis, McGill University, 2004. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84240.

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Five steels were used in the present work to investigate the dynamic, static and metadynamic recrystallization behavior of hypereutectoid steels of 1% carbon, alloyed with high silicon and microalloying levels of vanadium. Compression tests were performed using single and double hit schedules at temperatures between 875--1100ºC, strain rates of 0.01s-1 -1s-1, and inter-pass times of 0.1--500 seconds and 0.1--30 seconds for static recrystallization and metadynamic recrystallization, respectively. For dynamic recrystallization, it was found that an increase in carbon and vanadium content

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43

Lodwig, Geraint Wyn. "Hot dip coating of high strength low carbon steels." Thesis, Swansea University, 2004. https://cronfa.swan.ac.uk/Record/cronfa42742.

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In response to increasing demand for high strength automotive steels, the development of galvanised dual phase steels has become more significant in recent years. At present, a requirement for galvanised high strength steels with tensile strengths in excess of 600 MPa exists within the automotive industry. The present programme focuses on seven C-Mn based steels, each steel varying in key additions such as silicon, chromium, vanadium, molybdenum and niobium. A composition range wt% of C (0.07-0.2), Mn (1.3-1.5), Si (0.05-1.3), Cr (0.05-0.45), V (up to 0.01), Mo (up to 0.01) and Nb (0.001-0.01)

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44

Lencina, Rodrigo. "Optimization of high carbon austenitic manganese steels for comminution processes." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3424542.

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Austenitic manganese steels are widely used in mineral comminution processes due to their good wear resistance and high toughness. The classical chemical composition for austenitic manganese steel in these applications is about 12%Mn and 1.2%C, steel first produced by R. Hadfield more than a century ago. Ever since, many efforts to improve its mechanical properties and wear resistance have been made, mostly driven by the continuous demand of the mining industry for bigger crushing equipment and lower production costs. In this work, two types of austenitic manganese steels containing a rel

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45

LIMA, LIANA M. F. G. de. "Estudo da evolução da textura, da microtextura e da mesotextura de recristalização, após baixos graus de deformação a frio, em dois aços ferríticos com baixo teor de carbono." reponame:Repositório Institucional do IPEN, 2005. http://repositorio.ipen.br:8080/xmlui/handle/123456789/11269.

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Made available in DSpace on 2014-10-09T12:50:07Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:02:06Z (GMT). No. of bitstreams: 1 10457.pdf: 13419642 bytes, checksum: 823b4f1fc4fdfe5858d116b42196a9c2 (MD5)<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP

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Bradley, Rusudan. "The effect of workpiece compostion of free-cutting steels on machinability using coated and uncoated high speed tools." Thesis, Liverpool John Moores University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.388522.

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47

Plennevaux, Cécile. "Etude des risques de corrosion et de rupture différée des aciers en présence d'H2S dans les conditions d'exploration de pétrole et de gaz à haute pression et haute température." Electronic Thesis or Diss., Lyon, INSA, 2012. http://www.theses.fr/2012ISAL0101.

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L'exploitation des champs de pétrole et de gaz sous haute pression (HP) et haute température (HT) a augmenté ces dernières années, nécessitant de réévaluer les risques de corrosion dans ces milieux de plus en plus sévères. Afin de contribuer à une meilleure évaluation des risques de rupture différée des aciers en présence d'H2S (SSC, Sulfide Stress Cracking) dans ces conditions, trois axes de recherche ont été suivis. Nous avons d'abord identifié un besoin d'amélioration de prédiction des conditions corrosives sous haute pression et haute température, et en particulier pour le calcul du pH in

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Husain, Khaled Salman Adwan. "Microstructure and properties of low-carbon steels processed by high pressure torsion." Thesis, University of Southampton, 2015. https://eprints.soton.ac.uk/386907/.

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In this study, low-carbon steel (0.1 wt.% C) in ferritic-pearlitic (FP) and ferritic-martensitic (FM) initial states were processed by high pressure torsion (HPT) up to 10 turns under a pressure of 6 GPa at room temperature (RT). The HPT-processed FM samples were tempered at 150oC to 550oC. The microhardness monotonically increased with the number of turns up to 10 turns. After 10 turns, the microhardness had increased to 3 times that of the initial state for both the FP and FM samples. The microhardness of the individual phases, ferrite and martensite, in the FM processed samples increased wi

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Chamisa, Alfonce. "Development of ultra high strength steels for reduced carbon emissions in automotive vehicles." Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/6274/.

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Automotive steels with enhanced strength and ductility beyond the current bounds can be engineered through microstructural strategies that take into account the benefits brought about by nanoprecipitates formed during the transformation from austenite to ferrite. Three multiphase steel compositions were initially studied. A patented Ti-Al-Mo steel composition was selected as the baseline for comparison with the other two steels. It is claimed that this steel has exceptional mechanical properties. The Ti and V microalloyed steels were selected to check whether interphase precipitates (IP), whic

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Erkami, Ali Akbar. "The studies of high strain deformation in carbon steels containing differing amounts of pearlite." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303427.

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